LC5525F LED Driver IC Equivalent & Substitute Parts

Part Overview

The LC5525F is an AC DC offline switcher LED driver IC manufactured by Sanken Electric USA Inc., housed in a TO-220-7 package with through-hole mounting. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The LC5525F features an internal switch and single output configuration, operating across a temperature range of -55°C to 115°C with a maximum supply voltage of 20V. Identifying compatible substitutes ensures design flexibility while maintaining functional equivalence in LED driver applications.

Key Parameters

Parameter	LC5525F Value
Manufacturer	Sanken Electric USA Inc.
Category	Power Management (PMIC)
Type	AC DC Offline Switcher
Internal Switch(s)	Yes
Number of Outputs	1
Voltage - Supply (Max)	20V
Operating Temperature	-55°C ~ 115°C (TA)
Mounting Type	Through Hole
Package / Case	TO-220-7 Formed Leads
Product Status	Obsolete
RoHS Status	RoHS Compliant
MSL	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LC5525F is determined by the following core parameters: AC DC offline switcher topology, single output configuration, internal switch presence, maximum supply voltage compatibility (20V), and through-hole or surface-mount packaging options. The substitute parts listed below maintain functional equivalence as LED driver ICs with AC DC offline switcher architecture. Substitution logic is based strictly on these electrical and mechanical parameters without consideration of performance optimization or feature enhancement beyond the original specification.

The four substitute parts identified are:

TPS92020DR (Texas Instruments)
LNK408EG (Power Integrations)
LM3445MX/NOPB (Texas Instruments)
FLS0116MX (Fairchild Semiconductor)

Parameter Comparison

Parameter	LC5525F	TPS92020DR	LNK408EG	LM3445MX/NOPB	FLS0116MX
Manufacturer	Sanken Electric USA Inc.	Texas Instruments	Power Integrations	Texas Instruments	Fairchild Semiconductor
Type	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher	AC DC Offline Switcher
Internal Switch(s)	Yes	No	Yes	No	Yes
Number of Outputs	1	1	1	1	1
Voltage - Supply (Max)	20V	18V	725V	12V	20V
Operating Temperature	-55°C ~ 115°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 150°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TA)
Mounting Type	Through Hole	Surface Mount	Through Hole	Surface Mount	Surface Mount
Package / Case	TO-220-7 Formed Leads	8-SOIC (0.154", 3.90mm Width)	7-SSIP, 6 Leads, Exposed Pad, Formed Leads	14-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width), 7 Leads
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	Not specified
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not specified

Engineering Selection Recommendations

All four substitute parts maintain active product status, ensuring long-term availability and supply chain continuity compared to the obsolete LC5525F. TPS92020DR and LM3445MX/NOPB are ROHS3 compliant, representing the most current regulatory alignment. LNK408EG and FLS0116MX are RoHS compliant, meeting baseline environmental standards. All substitute parts carry MSL rating of 1 (Unlimited) where specified, indicating minimal moisture sensitivity.

For through-hole mounting applications requiring direct form-factor compatibility, LNK408EG is the only substitute maintaining through-hole packaging. For surface-mount designs, TPS92020DR, LM3445MX/NOPB, and FLS0116MX provide SOIC package options. Maximum supply voltage compatibility varies: FLS0116MX matches the 20V specification of the LC5525F, while TPS92020DR operates at 18V maximum and LM3445MX/NOPB at 12V maximum. LNK408EG operates at significantly higher supply voltages (36V to 725V), suitable for different application requirements.

Frequently Asked Questions (FAQ)

Q: Can TPS92020DR directly replace LC5525F in existing through-hole PCB layouts? A: No. TPS92020DR uses 8-SOIC surface-mount packaging, while LC5525F uses TO-220-7 through-hole packaging. PCB redesign is required for this substitution.

Q: Which substitute part maintains the closest maximum supply voltage specification to LC5525F? A: FLS0116MX matches the 20V maximum supply voltage of LC5525F. TPS92020DR operates at 18V maximum, and LM3445MX/NOPB at 12V maximum.

Q: Is LNK408EG suitable for applications requiring 20V maximum supply voltage? A: LNK408EG operates at 36V to 725V supply voltage range, exceeding the 20V specification. Application-specific circuit design determines suitability.

Q: What is the primary difference between substitute parts with internal switches versus without? A: LC5525F, LNK408EG, and FLS0116MX feature internal switches. TPS92020DR and LM3445MX/NOPB do not. Internal switch presence affects circuit topology and external component requirements.

Q: Are all substitute parts RoHS compliant? A: TPS92020DR and LM3445MX/NOPB are ROHS3 compliant. LNK408EG is RoHS compliant. FLS0116MX compliance status is not specified in available documentation.

Q: Which substitute part offers the widest operating temperature range? A: LNK408EG operates from -40°C to 150°C (TJ), providing the widest temperature range among all listed substitutes.

Q: Can multiple substitute parts be used interchangeably in the same design? A: No. Each substitute part has distinct electrical parameters, package types, and topologies. Circuit design must be tailored to the specific substitute part selected.

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